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Adaptive spectrally precoded orthogonal frequency-division multiplexing (ASP-OFDM) is a recently proposed adaptive modulation scheme to significantly improve the system throughput in adaptive OFDM applications. In this paper, new spectral precoder is proposed for ASP-OFDM with cyclic prefix (ASP-CP-OFDM) on the flat fading channel. By jointly adapting the precoding order for spectral precoder and...
Adaptive transmission technique adopting spectrally-precoded orthogonal frequency-division multiplexing (SP-OFDM) signals is studied on the flat fading channel. By jointly adapting the precoding order for spectral precoder, transmission power, and the component modulation for OFDM, adaptive SP-OFDM is shown to outperform conventional adaptive OFDM significantly in average spectral efficiency.
Receivers for horizontally encoded LTE based MIMO-OFDM systems are considered in this paper. Adaptive modulation and coding (AMC) is used as well as precoding. The linear minimum mean square error (LMMSE), successive interference cancellation (SIC) and K-best list sphere detectors (LSD) are compared. The receivers were designed and implemented for 2??2 and 4??4 antenna systems and meet the decoding...
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